Holding means for detachable straps



Dec. 20, 1927. 1,653,535

0. BONHAJO HOLDING MEANS FOR DETACHABLE STRAPS Filed April '7. 1927 INVEN TOR.

avid. bonhajc.

ATTORNEY.

Patented Dec. 20, 1927.

unl'len STATES 7 DAVID BONEQJQ, T HEW'PD irnnruoir Y, ASSIGNOR TO THEWATDSWORTH WATCH CAISE COMPANY, (31-? DAYTQIT, KENTUCKY, A CORPORATION033 KENTUCKY..

ZilULDF'NG' IVIEAIYQ .5 01?) Application filed April 7,

M y invention relates to improvements over Fatent No. 1359 September 80,1- to li adsworth and Arthur J11, to The Na sworth :y invention are toprovide simple, e-. cientpcoinpact and economical detachable means i' orreadilyand conveniently attaching strap or metal band to a wrist watch.

My invention consists in providing a pair of loop lugs integrallyattached to and centrally disposed rela 've to the ends of a watch-case,a pair of straps having an openor slot cut in the looped ends thereoi,and a removable pin adapted to be inserted through the looped ends ofsaid straps and said loop lugs, respectively, for the purpose oi'detachablv fastening said straps to said watch case.

My invention also consists in the construction, coinbiinition locationand arrangen'ient of parts, as herein set forth and claimed.

In the drawing:

1 is a .tront view of a watch case embodying my invention, the straps,dial and crown being illustrated by dottedlines;

Fig. 2 is a side elevation oi Fig. 1;

Fig. 3 a perspective view of the watch case, the dial crown and strapbeing omittedto clearly illustrate the position of one of the loop lugsand which also shows the pin ren'mved;

Fig. 4; is a perspective detail of one oi the loop lugs before beingattached to a watch case;

Fig. 5 is an elevational view of the strap retaining pin, the strapretaining pin cap being shown in central longitudinal section and aportion oi the watchcase with one of the loop lugs attached theretoshown by dotted lines; and

Fig.6 is a bottom Ft'ragmental view of one oi the straps showing thelooped end for the purpose of illustrating the slots on the under sidewithin which the loop lugs respec tively are inserted.

In the embodiment oi my invention illustrated and which shows apreferred construction, I provide a watch case 1 of any preferred styleor shape, the ends 2 and 3 of which have loop lugs l and 5, respectively, securely attached thereto as by solder brazing or any other cesiredmethod. Said lugs and 5 are provided with longitudi- DETACI-IABLESTRAPS.

1927. Serial No. 181,797.

11 lly cz-qtending holes 6 and 7, respectively,

which are of the same diameter as stem 8 of snap pin bar 9. Said snappin bar 9 00mprises stem 8, one end of which is permanently receivedwithin socket 13 of member 10, said member 10 terminating in head 11 onouter end 12. he outer periphery o't I'J'IGll'lbQl" 10 is of the samediameteras the outer periphery of lugs 4t and 5, respectively, asclearly shown in Figs. land 5.

As illustrated in Fig. 5, stem 8 is provided with annular grooves leland 15. Groove is: is for the purpose of permanently securing end 16 ofstem 8 within socket 13 of member 10 and groove 15is'ior the purpose ofdetachably holdingmember 17 upon end 18 of said stem 8, as will be morefully described hereafter. Stem 8 may be permanently held in socket 13by spinning orcompressing the walls of said socket to enter groove 14-.Said member 1? comprises cylindrical body portion 19 which terminates inh end 20 at its outer end 21. Said cylindrical body portion 19 isprovided with internal socket 22 of substantially the as end 18 of stem8 and is flared inwardly towards -,nd 23 oft said cylindrical bodyportion 1.9 thereby forming retaining edge or inturn d flange 24;, asclearly shown in Fig. 5. The purpose of retaining edge 24 is todetacl'iably engage annular groove '15 and reinovably secure member 17upon end 18 of stem 8. Slots 25 cut into cylindrical body portion 19assistia allowing-end 18 of stem 8 to'i orce its way into socket 22 ofsaid cylindrical body portion 19 when attaching the watch straps 26 and2? to the watch case '1, as more clearly described hereafter underassen'ibling. The straps 26 and -27 are provided on their inner ends 28and 29 with loopsBO and 31, respectively. Openings 32 and 33 out in theunderside of straps 26 and ctively, and centrally located within loopsand 31 of said strap are for the purpose oi receiving loop lugs 41: and5, respectively.

As the manner in which straps 26 and 27 are fastened or attached towatch case 1 is the same, a description of one will suflice for both.For example, assume that strap 26 is to be attached to watch case 1 andthat loop lug a has been permanently fastened to said watch case in itsproper position, as shown in Figs. 1 and 8, the first step is to insertsaid lug 4 within opening 32 of strap same diameter 1 v 26 untilelongated hole 30 located in loop 30 alines with longitudinallyextending hole 6 of said lug 4. Then insert end 18 of stem 8 within hole30" in loop 30 of strap 26 and hole 6 of lug 4 until shoulder 10 of member 10 abuts against taco 4" of lug i at which time end 18 of stem 8will protrude beyond taco 4-. of lug 4, as clearly shown in Fig. 5. Thenend 23 of cylindrical body portion 19 is inserted within the oppositeend of hole 30 within loop 30 of strap 26 whereupon soclrct 22 receivessaid end 18 of stem 8 until retaiuing edge 24: snaps into annular groove15. as shown by dotted lines in Fig. 5.

It will be clearly apparent that strap is thus firmly held in detachableengagement with watch case 1 by members 10, 8 and 17, respectively.Heads 1.1 and 20 of members 10 and 17, respectively, closely titagaii'ust edges 26" and 26 of strap 26, thereby entirely covering orconcealing hole 30, as shown in Figs. 1 and 2. The term loop strap isherein defined as meaning a loop strap or metal. band or theirequivalent.

To remove or detach strap 26 from watch case 1, simply remove member 17and draw member 10 and stem 8 outwardly from engagement within hole 6 oflug 4.

An advantage of this construction is that it insures a maximum ofstrength in attaching the strap or metal band to a watch case and hasthe attaching members concealed.

Another advantage of my invention is that a strap fastening means ofthis construction allows the attachment of full size straps to watchcases of narrower widths than has heretofore been possible with themeans heretoiore used.

It will be understood that certain changes and modifications can be madewithout departing from the scope or spirit of the invention as definedin the claims.

What I claim as new and desire to secure by Letters Patent is:

1. In combination with a watch case. an elongated lug secured along itslongitudinal edge to said watch case and having a hole extendinglongitudinally thcrethrough, a strap having a loop at one end thereof,which loop provided with an opening on its underside for the purpose of:receiving said lug and a strap holding pin adapted to be inserted withinsaid looped end of said strap and into said hole in said lug wherebysaid strap is detachably secured to said Watch case.

2. In combination with a watch case, a lug securely fixed centrally toone end there- 0t and having a hole therethrough, a strap, one end ofwhich terminates in a loop pro vided with an opening for the purpose ofreceiving said lug, a strap holding pin adapted to fit within the loopedend of said strap and in said hole in said lug and a retaining capadapted to tit within said looped end and over the smaller end of saidpin whereby said strap is detachably secured to said watch case.

8. In combination with a watch case, a lug securely attached to one sideof said watch case and having a hole therethrough, means adapted toengage said lug comprising a detachable pin one end of which is reducedin diameter and provided with an annular groove, a cap adapted to engagesaid reduced end and said groove, and a strap having a looped endprovided with an opening adapted to receive said lug, and a pin insertedthrough said looped end and lug into said cap whereby said strap isdetachably secured to said watch case.

t. In combination with a watch case, :1 lug oppositely disposed at eachend thereof and each lug having a hole extending therethrough, a pair ofstraps each having a looped end with an opening centrally locatedtherein, a pair of strap holding pins adapted to engage said looped endsof said straps, respectively, and said hole in said lugs, respectively,and a pair of pin retaining caps adapted to engage and retain said pins,respectively.

5. In combination with a watch case. a lug having a hole therethroughand securely tastened centrally at one edge of said watch case, a strappin, one end of which terminates in an enlarged head and the other endof which terminates in a reduced shank having an annular groove thereinand a retaining cap one end of which terminates in an enlarged head andhaving the other end slotted and provided with a socket and flanged endwhich socket detachably receives said shank and which flanged enddetachably engages the annular groove of said pin.

DAVID BONIIAJO.

